Nut-lock



(No Model.)

H. B. RO'BISCHUNG. NUT LOCK.

No. 596,033. Patented Dec. 21, 1897.

WITNESSES INVENTOH 0 Q ATTORNEY.

Y U ITED STATES PATENT- OFFICE.

HENRY B. ROBISOI-IUNG, KALAMAZOO, MICHIGAN, ASSIGNOR TO HENRY D. LAUGHLIN, OF ST. LOUIS COUNTY, MISSOURI.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 596,033, dated December 21, 1897.

Application filed June 5,1897- Serial No. 639,548. (No model.)

To all whom it may concern.-

Be it known that I, HENRY B. Romsonmve, a citizen of the United States, residing at Kalamazoo, county of Kalamazoo, State of Michi gan, have invented certain new and useful Improvements in Nut-Locks; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, where- 1n- Figure 1 is a plan View of a nut-lock embodying my invention, the dotted lines indicating the position of the bolt and nut when the nut-lock is in service. Fig. 2 is a side elevation of the nut-lock,,showing its position with relation to the bolt and nut before the nut has been forced home. Fig. 3 is a side elevation of the nut-lock, showing its relation to the bolt and nut after the nut has been forced home; and Fig. 4 is a diagram illustrating the interior lines of the nut-lock.

Like symbols refer to like parts wherever I they occur.

My invention relates to that class of devices commonly termed nut-locks and is of the variety commonly termed washerlocks, which are interposed between the nut and a suitable bearing and are provided with a dog or biting-point which engages and resists the rotation of the nut when the latter becomes loosened by jarring or otherwise. So far as I am aware such looks as commonly shaped have heretofore been in general of circular or spiral form, which permitted of their rotation in applying or removingthe nut, said rotation in some instances being prevented bya tangentially-projecting lug or arm adapted to rest agaist an abutmentas, for instance, a rail-flange--the spring of the washer being depended on to cause the severed end of the coil to engage and hold the nut. Such forms of nut-lock, being easily and cheaply produced on the common forms of ceilingmachines, have been extensively used, though only partially effective for the purpose intended.

The object of my present invention is the production of a simple and effective nut-lock which will not rotate on applying or removing the nut and whose resistance can only be overcome by a force sufiicient to spread and raised above the plane of the other to present a biting or chisel edge to the under side of the nut.

There are other minor features of invention, all as will hereinafter more fully appear.

I will now proceed to describe my invention more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, A indicates a nut, B a bolt, and O a nut-lock embodying my invention.

The nut-lock O, which is preferably made of about quarter-inch steel bar, is formed with converging free ends 1 and 2, the included space 3 between which is of wedge shape or forms an acute angle to clamp and bind upon the bolt when force is applied to either of the free ends 1 and 2, so that any reverse rotation of the nut tends to cause the wedge-space or included acute angle of the nut-lock to engage with the bolt. The shorter of said free ends, 1, is given an upward curve or is upwardly inclined from the plane of the free end or lug 2, so as to present a biting or chisel point 4 to the under surface of the nut and resist the reverse rotation thereof.

The portion 5 of the lock intermediate of and connecting the converging free ends 1 and 2 may be of any suitable shape which will bring it substantially within the area of nut A, but is preferably half of ,a circle, to which the converging portions 1 2 are tangents, thus giving to the interior of the lock a somewhat pear shape.

In service the nut-lock C is placed around the bolt B in the usual manner, after which the nut A is applied and forced home (see Fig. 3) until the spring of the lock is overcome and the under surface of the nut bears uniformly on the adjacent surface of the nutloek except at or adjacent to the point 4, which point, being at a slight angle, bites the under surface of the nut at said point.

The nut lock C, excepting the free extremity of the part 2, being within the area of or covered by the nut, an extended frictional bearing-surface is obtained which resists the reverse movement of the nut, and the outer ends of the square of the nut being practically on a line with the extreme inner edge and point 4 of the lock the slightest reverse rotary movement of the nut will cramp the bolt B in the wedge-opening 3, formed by the converging sections 1 and 2 of the lock, so as to give the point-section 1 a side bearing, which prevents recession or rotation and can only be overcome by a force sufficient to straighten out or open out the section 2, and until this occurs the nut cannot rotate.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is-

1. A single nut-lock having converging free ends which form an acute angle or included wedge-shaped space for the reception of the bolt, one of said free ends having an upward curve,0r arranged at an angle to the plane of the other free end, substantially as and for the purposes specified.

2. A single nut-lock having the form of a half-circle terminating in converging tangential free ends which form an acute angle or wedge-shaped space, one of said ends inclined to the plane of the other free end, substantially as and for the purposes specified.

In testimony whereof I affix my signature, in presence of two Witnesses, this 2d day of June, 1897.

HENRY B. ROBISOHUNG. 

